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Long Windows: Change the way you see the world.

We are the Mid-Atlantic’s window replacement and window installation experts. Long Windows is the exclusive provider of Quantum2 Heat Mirror® windows for your Washington, D.C., Maryland, Northern Virginia or West Virginia home. Now serving Boston, Mass. and the New England region.

Why choose Long Windows™?

Long Windows: The exclusive provider of Quantum2 Heat Mirror windows for the Washington, D.C. region / NOW AVAILABLE in Boston, Mass. and New England.

Long Windows




Rest easier knowing that our residential replacement windows come with recessed steel locks. That’s adding a powerful degree of security to your home.

We build Trust and Peace of Mind into every Long Window.

Long Windows heat mirror window

Long Windows is the sole supplier of Quantum2 Heat Mirror windows in the Washington, D.C., metro region. We are proud to now offer our window products in Boston, Mass. and New England, as well. We take our dedication to quality seriously. We never settle for products that you’d have to settle for, too.

Heat Mirror windows were named one of Popular Science magazine’s top 100 inventions of the past 1,000 years in its Millennium Year Special Edition. 

Every new window installation project is given the same care, courtesy and respect that we would give our own family. When you work with Long Windows, you become part of our family, too.

Long Windows is part of the Long Fence and Home® family of brands. Our business has roots that stretch back to the original Long’s Fence Co. That company was launched in 1945 by Henry “Tots” Long and his son, Robert. The first location was a tiny parcel of land in the heart of Washington, D.C.

The Long family continues to lead the way in home improvement excellence. The original values of the company — quality craftsmanship, the best materials and outstanding customer service — remain the core of our business today.

 
The exclusive Washington, D.C. provider of Quantum2 Heat Mirror® windows.
The superior window product on the market today.
Windows that make your home smarter and safer.
Quantum2 Heat Mirror® windows make your home more energy-efficient, secure and look great, too.
An extensive track record of home improvement excellence.
The LONG name has stood for outstanding craftsmanship and quality customer service since 1945.

New windows. A rock-solid warranty. Let’s talk.

When you need replacement windows, your budget is always on your mind. We can give you the peace of mind you need. Our Quantum2 Heat Mirror windows are maintenance-free, improve your home’s security and may even cut your energy bills.

Have a problem with your new windows or the window installation? We will make the situation right because we believe in 100% customer satisfaction. Contact us today.  

Need help paying for your beautiful new windows? We offer worry-free financing. We’re happy to work with you to find an affordable solution. Learn more now.  

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Get educated: Learning more about new window replacement and window installation.

Ready for new windows? Here’s what Long Windows has to offer.

  • Window Options and Showcase
    Long Windows offers double hung windows, casement windows, awning windows, hopper windows, slider windows, bow and bay windows, picture windows, garden windows and specialty windows in a variety of interior and exterior color options and grille designs. See what Long Windows can do for your home.

  • Window Benefits and Specifications
    Protection from harmful UV rays, noise pollution and potential intruders — Long Windows can make your home safer and more comfortable. Learn more about energy-efficient windows from a family business with over 70 years of home improvement experience.

  • Window Testimonials
    Homeowners throughout the Washington, D.C., Maryland, Northern Virginia and West Virginia regions enjoy the unique benefits provided by Long Windows. We are proud to now serve Boston, Mass. and the New England area, as well. See some of our recent window work and learn how people just like you enjoy the view provided by Long Windows.

Let's talk about windows.

If it's time to replace your windows, we should talk today. We look forward to protecting your family and your home.